721434 - A11Y_CONSUMERS histogram shows 100% for 2 bars

Status: RESOLVED WORKSFORME

(Mozilla Metrics :: Frontend Reports, defect)

Description

[Vladan Djeric (:vladan)]

I might be misinterpreting the chart, but it looks like the A11Y_CONSUMERS histogram covering 2011/01/01-Today has 2 buckets with 1 sample each, yet the histogram bar for each bucket is 100%. Is this a bug?

Comment 1

[David Bolter [:davidb] (NeedInfo me for attention)]

Note: I confirmed with Marco Zehe that running both NVDA (value 0) and Jaws (value 1) simultaneously should not happen much if at all in the wild.

Comment 2

[Pedro Alves]

The normalization is wrong, we'll fix it. But what that means is that it's a 50% / 50% situation.


What filters are you using?

Comment 3

[Vladan Djeric (:vladan)]

(In reply to Pedro Alves from comment #2)
> What filters are you using?

I was using the default filter settings (AppName="Firefox", everything else blank or "All")

Comment 4

[Pedro Alves]

I dont know what the values mean - is it unexpected to have them in the same order of magnitude?

Comment 5

[Paulo Pires]

It's fixed now, we have a result of (0,1), (1,1), (2,0) so the bars are equal.
All the data is normalized correctly.

Comment 6

[David Bolter [:davidb] (NeedInfo me for attention)]

(In reply to Pedro Alves from comment #4)
> I dont know what the values mean - is it unexpected to have them in the same
> order of magnitude?

Each value represents the presence of a known distinct screen reader injected dll into our process space. There are 7 possible values right now.

Comment 7

[David Bolter [:davidb] (NeedInfo me for attention)]

(In reply to Paulo Pires from comment #5)
> It's fixed now, we have a result of (0,1), (1,1), (2,0) so the bars are
> equal.
> All the data is normalized correctly.

Looks right. We don't really know what distribution to expect other than values 0 and 1 should dominate.

One thing I'd like to be able to do is plot a line graph for each value 0 through 6, over time. Is that something I can do today?